Top scorer James Grieves and captain Phil Morris will miss tonight's Premier League action for Newcastle Diamonds at Hull.

Neither has recovered sufficiently from their crash at Stoke on Saturday when guesting for opposing sides.

Grieves said on Sunday he hoped to ride this evening but has had to return to hospital for further treatment on his injured thumb.

Morris is still in hospital with internal bleeding as well as elbow damage and it is impossible to put a date on when he will be able to return to the track.

The Diamonds have called up Sheffield's Sean Wilson as a guest in place of Grieves.

Just as they did on Sunday in the thrilling four-point victory over Berwick, Newcastle will share out Morris's rides under the rider-replacement rule, though Wilson is not eligible for one.

Wilson has only just returned to action himself after a long spell out with shoulder damage and is keen to take extra bookings to boost his bank balance.

Two weeks ago, Wilson scored 17 points for Sheffield at Hull in a narrow 50-45 defeat, so team manager George English looks to have come up trumps with his choice of guest.

Newcastle hold a six-point advantage in the quest for the bonus point, having beaten the Vikings 48-42 at Brough Park in June.

Hull skipper Paul Thorp, who did a magnificent job along with Josef Franc in engineering Newcastle's win over the Bandits at Brough Park, could well play a villain's role in the eyes of Diamonds' fans this evening.

Thorp said: "It is make-or-break time for Hull with a lot of meetings coming up.

"We have to get into the play-offs otherwise the season will be pretty fruitless."